Premium gas...is it worth it?

HarlemsOwn

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do what ever your car recomends

being cheap will fukk ya shyt up

just spend that extra 10 cents nikka
 

ThumpDaddy

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If it says it's recommended then do it. When I had my Grand Prix GTP it said "premium unleaded only". I mean you got to pay to play.
 

88m3

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gotta pay to play, play boi



you'll fukk your engine up something lovely otherwise
 

Mr210

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my nissan maxima says it reccomends 91 octane, so for most of the time ive had the car ive put in 93 octane, however the book says it doesnt require it as long as you dont put 97 octane (regular) so I switch up putting 89 and 93 octane, ive talked to several maxima owners who say the midgrade is just fine
 

klientel

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It's all the same shyt, just different burn rates of combustion. Quality between the cheap gas and the ultra premium advanced techron level III gas is practically the same. You just have to use what ever gas is recommended for you engine or you could risk engine knocking.

The big thing to worry about is using a higher or lower grade that recommended can void your warranty. So if a sensor fukks up cuz you wanted to be cheap and save 3 dollars, then thats on you.
 

unit321

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My vehicle says Premium is recommended.

Your take...?
Do what your automobile manufacturer recommends. They aren't getting any cut of the gasoline money after the sale.

Why?
Your particular car is tuned to work best with premium gasoline. For non-turbo'ed cars, the engine is expecting to get higher octane gasoline so that it will burn more consistently for every 3rd cycle (the first cycle is insertion of air/gas mixture, the second cycle is compression, and the third cycle is combustion of the air/gas mixture). The fourth cycle pushes out the exhaust gases, which contains unburnt gasoline.

You might ask, what's the big deal? So I get a little less HP per cycle.
When you go to a gas station who 'illegally' dilutes their gasoline with water, that will decrease the octane. When you put this into your car, and your car doesn't need premium gas i.e. 87 octane for your car, you'll get what is called knocking or pinging. When you put in non-premium gas into a car that needs premium gas, you are doing the same thing.
The problem is that cheaper gasoline allows for more unburnt gasoline in the cylinders which can detonate or burn at the wrong time of the cycle. This creates a knock in your engine. These knocks will harm your engine.

For turbo'ed cars, your car will spray in more fuel into the air/fuel mixture for the higher fuel needs. When you are using 87 octane, you are exacerbating the situation. Turbos push more air and fuel into the cylinder and it aids in compression (superchargers do the same thing). This results in a stronger third cycle explosion. To note, a turbo'ed 2 liter, 4 cylinder engine has the same volume of air in each cylinder chamber as a non-turboed 2 liter, 4 cylinder engine. Turbo-charged engines usually require you to retard their timing, i.e. the spark goes off a little later in their third stroke/cycle rather than at TDC (top dead center) for that cylinder. If it's too early, it will result in knock. I'm not super good at explaining why, but that's the case. If you've put in cheap gas, and the timing is retarded, and even more gasoline is unburnt within the cylinder after BDC (bottom dead center). Your knock or ping is going to be even greater and will damage your engine even more.

Why does non-turbo'ed BMW need premium gas and a Toyota Corolla can do with non-premium gas?
The internal combustion engine is very inefficient. Think about a top fuel drag race car. All the flames coming out of the headers is unspent gasoline. This happens on a much smaller scale in a regular car. Your intake valves take in the air/fuel mix on the first stroke. The intake valves close on the second stroke. The exhaust valves open on the fourth stroke and close on the first stroke. On paper, that's the most efficient. But in reality, The intake valve stays a bit open at the beginning of the second stroke and the exhaust valves start opening on their third stroke before it hits top dead center. What BMW does it try to make the engine more efficient. They try to keep the exhaust valves from opening as early so more torque can be extracted per every third stroke. They try to close the intake valves sooner in the beginning of the second stroke. Putting in stronger valve springs is part of the solution. Modifying the cams is also done. In order to get the engine to work with these these modified intake/exhaust times AND to avoid pinging, they require you to put in premium gas.
 

Ricky Church

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do what ever your car recomends

being cheap will fukk ya shyt up

just spend that extra 10 cents nikka

this the truth.

I told dude premium for my Audi once, and he put regular, shyt knocked for a minute until I used an Octane Booster treatment from an auto parts store. I was madd as hell.
 

the mechanic

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It really depends on the car...if its european or a cadillac i wouldnt
 

Ayo

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I get 11mpg city. So that extra .10 cents does hurt the pocket a little. But like everyone says you gotta pay to play! And nothing less than 93 is touching my gas tank.
 
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